I made a switch board for practical training. I will describe the following two points. Because the students use it sturdy, with the 12 (mm) control panel as the foundation, we placed the cutout switch, the changeover switch etc, and attached the terminal terminal for connection. However, in order to fix the wiring to the board, since the shaft is a bit short, we cut off the back side of the board by about 5 (mm) with a 20 φ drill. In actual thing, the length of the shaft is 17 (mm), but I thought it would be better to make it a little longer than 25 (mm). In the three phases, red, white and black color coded wires and so on, we would like to manufacture one more color "white". If white is difficult, another color distinguishable from red and black is good, so I think that it is good to have three colors. Other than that, I am satisfied.

I made a switch board for practical training. Because the students use it sturdy, with the 12 (mm) control panel as the foundation, we placed a cutout switch, a changeover switch, etc, and attached a terminal for the connection. However, in order to fix the wiring to the board, since the shaft is a bit short, we cut off the back side of the board by about 5 (mm) with a 20 φ drill. In actual, the length of the shaft is 17 (mm), but 25